Jacket used in copy making



Dec. 4, 1962 D. R. HURLEY ETAL JACKET USED IN COPY MAKING Filed March11, 1960 INVENTOR.

DAIiI EL R. HURLEY 8 JOHN F. MC HUGH United States Patent M 3,066,679JACKET USED IN COPY MAKING Daniel R. Hurley, Cincinnati, Ohio, and JohnF. McHugh,

Brooklyn, N.Y., assignors to Interchemical Corporation, New York, N.Y.,a corporation of Ohio Filed Mar. 11, 1960, Ser. No. 14,290 1 Claim. (Cl.1291) The present invention relates to a new and useful article ofmanufacture; more specifically the invention relates to an improvedjacket for use in making copies of graphic originals such as letters,charts, etc.

In recent years a method of making copies of letters, charts, etc. hasbeen Widely commercialized wherein letters, etc. that have graphicrepresentations that will absorb light and infrared radiation andconvert it to heat, are reproduced onto heat-sensitive paper. Thethermographic copying method involves exposing the original and theheat-sensitive copy, in heat conductive relationship to each other, to astrong source of radiation rich in infrared radiation. The heat producedby the graphic representations on the original develops an exact copy ofthe original on the heat-sensitive copying sheets. The method is morefully described in U.S. Patents No. 2,859,351 and No. 2,859,352. Anapparatus specifically designed for carrying out the thermographiccopying method is described in U.S. Patent No. 2,859,352 and isavailable as the Ther-mo-Fax Machine from Minnesota Mining andManufacturing Company. Heat-sensitive paper for use in making copies inthe Thermo-Fax Machine can be produced in a variety of ways and numerouspatents have issued covering such papers.

Recommended procedure for using the Thermo-Fax machine is to employ ajacket to hold the original to be copied and the heat-sensitive copysheet in heat-conductive relationship as they pass thru the copyingmachine. The jacket consists of a sheet of relatively stiff white paperand a sheet of visibly transparent silk screen of equal length and widthfastened together along their upper edges to form the jacket. Thepresent invention is concerned specifically with improvements in thisjacket.

:In accordance with the invention an improved jacket is produced bymaking the bottom portion of the transparent silk sheet more rigid byadding additional stififening agents at this point. This improvementfacilitates use of the jacket in that it is easier to separate the paperbacking and the screen for insertion of the original and the heatsensitive copy sheet. Further, the stiffened lower 3,066,679 PatentedDec. 4, 1962 edge of the silk screen substantially completely overcomesany tendency of the screen to roll up or fold back at the corners. Afurther improvement provided by the invention is the printing ofinstructions for use on the paper sheet portion of the jacket. I havediscovered, for instance, that instruction for use can be printed onpaper so as to be visible through the silk screen and will not adverselyaffect the functioning of the jacket. It is necessary that anon-infrared absorbing ink be used to print the instruction. Red inksare preferred. Further, glassine may be used in place of silk in thetransparent screen.

The invention will be more clearly understood by referring to theaccompanying drawing wherein FIGURE 1 illustrates the embodiment of theinvention without the printed instructions on the paper, sheet backingand FIGURE 2 illustrates the embodiment of the invention having printedinstructions on the paper sheet backing.

In the drawing, a relatively heavy paper backing sheet 11 is attached at12, preferably using an adhesive, to a transparent silk screen 13. Silkscreen 13 has a stiffened lower edge 14, the stiffened portion beingpreferably /2 to inch wide for jackets to be used with ordinary lettersize and legal size stationery. The stiifened portion is preferably madeby adhering a strip of heavy paper to the screen. In the embodimentshown in FIGURE 2, the instructions for use are shown at 15. Theseinstructions are preferably printed in red ink and have the advantagethat they are always visible and available when needed; i.e., when thejacket is to be used in the thermographic copying process.

What is claimed is:

As an article of manufacture, a jacket for use in making copies ofgraphic originals by the thermographic copying technique, said jacketcomprising a backing sheet of relatively stiff paper attached along itsupper end to a transparent silk screen of the same width and length,said screen having a narrow stiffened portion attached to its lower endto facilitate use of the jacket, and said backing sheet having printedthereon, in a non-infrared absorbing ink so as to be visible through thescreen, instructions for the use of the jacket.

Roehm Dec. 22, 1953 Miller Apr. 3, 1956

